I started with just the amp, speakers, and Vellemen kit. when all was put together, the stock mic wouldn't work. I requested help from Mandalore (who i got the voice changer idea from) and he recommended using the Adafruit amped mics with button cells. When hooked to and powered by the amp itself, it comes out low. when hooked to the battery it doesn't put out anything, and I'm getting mixed results through the Vellemen, but it's still really quiet and garbled. I've played with all the Pots to see if it changed anything but I'm not getting any difference.